Pump



T. HOIL.

PUMP.

APPLICATION FILED MAR. 25. 1920.

Patented May 3L 119211 ATNT FEE.

TOBIAS HOIL, OF BUFFALO, NEW YORK, ASSIGNOR TO ROBERT L. PHILLIPS, OF

ATLANTA, GEORGIA.

PUMP.

nsvaaea.

Application filed March 25, 1920.

T 0 all whom it may concern:

Be it known that T, TOBIAS Horn, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Pumps," of which the following is a specification.

This invention relates to hand pumps of the kind that are used, for example, for spraying trees and plants with liquid insecticides and are adapted to be inserted in a bucket or receptacle containing the liquid for pumping the liquid therefrom.

The object of the invention is to produce a practical and durable pump of this nature which is of exceedingly simple and inexpensive construction, such that it can be sold for a very low price, while nevertheless the pump can be readily manipulated and will be eflicient and reliable in operation.

In the accompanying drawings Figure 1 is a side elevation partly in section of a pump embodying the invention.

Fig. 2 is a perspective view, enlarged, of the inlet valve removed from the pump.

Fig. 3 is a cross sectional plan view, full size, through the lower end of the cylinder above the inlet valve, on line 33 Fig. 1.

Fig. 4 is a sectional elevation thereof, full slze.

The pump comprises, as usual, a cylinder 10 in which a piston 11 is adapted to be reciprocated by a hand plunger or piston rod 12, a discharge tube 13, and inlet and discharge valves 14 and 15 respectively.

The cylinder 10 and the discharge tube 13 can be, and preferably are, made of sheet metal, the discharge tube being secured to the lower end of the cylinder by inserting its lower end in a hole in the side of the cylinder 10 and soldering or otherwise fastening it therein. The upper end of the discharge tube is connected to the cylinder by a suitable brace 16 which also preferably consists of a sheet metal tube which is thus light but strong. A removable sheet metal nozzle 17 is shown fitted on the upper end of the discharge tube but a hose or other discharge device could be attached to the discharge tube if desired. The piston 11 may be of any usual or suitable construction. The upper end of the piston plunger passes through a suitable guide, which as shown, consists of an annular plug 18 fitting in the upper end of the cylinder. An opening 19 is pref- Specification of Letters Patent.

Patented Inlay 31, 1921.

Serial No. 368,522.

erably provided in the upper portion of the cylinder for the free admission and escape of air above the piston in the operation of the pump.

In order to provide the pump with an inlet valve which will operate freely and be reliable and at the same time be exceedingly simple and inexpensive, the following construction is preferably employed: In the lower end of the sheet metal cylinder 10 is secured, preferably by soldering, the reduced neck of a hollow head which consists of a cup-shaped shell 20 which may be drawn or pressed into the shape shown from a piece of sheet metal, and a bottom piece 21 which is soldered or otherwise secured on, and closes the lower end of the shell 20. The horizontal top wall 22 of the head is provided with a central inlet opening 23 adapted to be closed by the inlet valve 14 which consists of a disk or piece of sheet metal adapted to rest loosely, fiat upon the top of the head over the opening 23 therein. The valve is retained in place on the head and its movement limited preferably by a bent strip of sheet metal 24 which is soldered to the underside of the valve and extends through the opening 23 and has outwardly projecting ends that extend under and are adapted to strike the edge of the opening 23 when the valve is lifted, thus limiting the opening movement of the valve. While the valve is loose, or is not attached to the top 22 of the head, nevertheless the stop strip 24 prevents the valve from falling away from the head in handling the pump. The valve is preferably of rectangular or non circular shape so that spaces are left between its side edges and the walls of the cylinder for the passage of the liquid, while the corners of the valve are adapted to engage the walls of the cylinder, the cylinder portion in which the valve travels preferably being of uniform diameter and thus hold the valve always centrally over the inlet opening without necessitating special guide means, the side walls of the cylinder portion constituting guide means for this purpose. The valve thus consists simply of a non-circular shaped piece of sheet metal and is not hinged or otherwise secured to the valve seat. There is, therefore, no hinge or part to wear or break as in the case of the usual flap or hinged valve. When the piston is raised the valve is lifted by the suction and the liquid enters through one or more suitable holes 25 in the sides of the hollow head and passes through the inlet opening 23 and around the side edges of the valve into the pump cylinder.

The discharge valve 15 preferably consists of a ball adapted to seat on the edge of a seat ring 26, soldered or otherwise suitably se-' cured in the lower end of the discharge tube. An ordinary marble can be used for this discharge valve. The movement of the valve is limited by a stop 27 consisting of a narrow strip of sheet metal which extends across the discharge tube above the ball valve and is soldered to the walls of the tube.

I claim as my invention:

1. In a pump, the combination of a chamber having side walls and an end wall with an opening therein for the passage of liquid, and a valve controlling said opening and consisting of a non-circular disk which rests loosely on said end wall over said opening and a stop which projects from said valve in position to engage said end wall to limit the opening movement of the valve, the side walls of said chamber being so formed as to hold said valve in place over said opening.

2. In a pump, the combination of a chamber having an end wall with an opening therein for the passage of liquid, a valve controlling said opening and consisting of a non-circular disk which rests loosely on said end wallover said opening, and a stop which projects from said valve through said opening and extends beyond the edge thereof for engaging said end wall for limiting the movement of the valve and preventing its displacement, said chamber having a portion of uniform-diameter above said end wall, the side walls of which portion provide guideways to center said valve over said opening. V

3. In a pump, the combination of a chamber having an outlet. opening and an" end wall with an inlet opening therein and unbroken and continuous sidewalls between said inlet and said outlet openings providing a chamber portion of uniform diameter, and a valve controlling said inlet opening and consisting of a non-circular disk which rests loosely on said end wall over said inlet opening and is movable in said uniform cham ber portion, said valve having portions engaging the side walls of the chamber to maintain the valve centered over the opening, said valve having a part for maintaining the valve loosely connected to said end wall and for preventing movement of said valve out of said uniform portion of said chamber.

Witness my hand this 6th day of March, 1920.

TOBIAS HOIL.

Witnesses C. IV. PARKER, M. J. PITMAN. 

